docstr: Tests whether the dataset_shard function works correctly for the remote
  workers with a dummy dataset shard for the local worker.
docstr_tok: ["Tests","whether","the","dataset_shard","function","works","correctly","for","the","remote","workers","with","a","dummy","dataset","shard","for","the","local","worker","."]
code: def test_dataset_shard_remote_workers_with_local_worker(self):
      """Tests whether the dataset_shard function works correctly for the remote
      workers with a dummy dataset shard for the local worker."""
  
      config = AlgorithmConfig().offline_data(
          input_="dataset",
          input_config={"format": "json", "paths": self.dset_path},
      )
      NUM_WORKERS = 4
  
      _, shards = get_dataset_and_shards(
          config, num_workers=NUM_WORKERS
      )
  
      assert len(shards) == NUM_WORKERS + 1
      assert shards[0] is None
      assert all(
          isinstance(remote_shard, ray.data.Dataset)
          for remote_shard in shards[1:]
      )
  
imports: import tempfile
  import os
  from pathlib import Path
  import unittest
  import pytest
  import ray
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.offline import IOContext
  from ray.rllib.offline.dataset_reader import DatasetReader, get_dataset_and_shards, _unzip_if_needed
label_desc: Use image node_id 5 for calling the TestDatasetReader obj's underlying member method code with example usage: obj.test_dataset_shard_remote_workers_with_local_worker() without return types